def ShouldInlineStruct(struct):
# TODO(darin): Base this on the size of the wrapper class.
if len(struct.fields) > 4:
return False
for field in struct.fields:
if mojom.IsReferenceKind(field.kind) and not mojom.IsStringKind(field.kind):
return False
return True
def AppendEncodeParams(initial_params, kind, bit):
""" Appends standard parameters shared between encode and decode calls. """
params = list(initial_params)
if (kind == mojom.BOOL):
params.append(str(bit))
if mojom.IsReferenceKind(kind):
if mojom.IsArrayKind(kind):
params.append(GetArrayNullabilityFlags(kind))
else:
params.append(GetDartTrueFalse(mojom.IsNullableKind(kind)))
if mojom.IsArrayKind(kind):
params.append(GetArrayExpectedLength(kind))
return params
def GetUnionTraitGetterReturnType(kind):
"""Get field type used in UnionTraits template specialization.
The type may be qualified as UnionTraits specializations live outside the
namespace where e.g. structs are defined.
Args:
kind: {Kind} The type of the field.
Returns:
{str} The C++ type to use for the field.
"""
if mojom.IsReferenceKind(kind):
return "%s&" % GetCppWrapperType(kind, add_same_module_namespaces=True)
return GetCppWrapperType(kind, add_same_module_namespaces=True)
def AppendEncodeDecodeParams(initial_params, context, kind, bit):
""" Appends standard parameters shared between encode and decode calls. """
params = list(initial_params)
if (kind == mojom.BOOL):
params.append(str(bit))
if mojom.IsReferenceKind(kind):
if mojom.IsArrayKind(kind):
params.append(GetArrayNullabilityFlags(kind))
else:
params.append(GetJavaTrueFalse(mojom.IsNullableKind(kind)))
if mojom.IsArrayKind(kind):
params.append(GetArrayExpectedLength(kind))
if mojom.IsInterfaceKind(kind):
params.append('%s.MANAGER' % GetJavaType(context, kind))
if mojom.IsArrayKind(kind) and mojom.IsInterfaceKind(kind.kind):
params.append('%s.MANAGER' % GetJavaType(context, kind.kind))
return params
def GetNameForElement(element):
# structs
if (mojom.IsEnumKind(element) or
mojom.IsInterfaceKind(element) or
mojom.IsStructKind(element)):
return element.mojom_name
# vectors
if (mojom.IsArrayKind(element)):
elem_name = GetFullNameForElement(element.kind)
return f'std::vector<{elem_name}>'
# maps
if (mojom.IsMapKind(element)):
key_name = GetFullNameForElement(element.key_kind)
value_name = GetFullNameForElement(element.value_kind)
return f'std::map<{key_name}, {value_name}>'
# struct fields and function parameters
if isinstance(element, (mojom.Field, mojom.Method, mojom.Parameter)):
# maps and vectors
if (mojom.IsArrayKind(element.kind) or mojom.IsMapKind(element.kind)):
return GetNameForElement(element.kind)
# strings
if (mojom.IsReferenceKind(element.kind) and element.kind.spec == 's'):
return 'std::string'
# PODs
if element.kind in _kind_to_cpp_type:
return _kind_to_cpp_type[element.kind]
# structs and enums
return element.kind.mojom_name
# PODs that are members of vectors/maps
if (hasattr(element, '__hash__') and element in _kind_to_cpp_type):
return _kind_to_cpp_type[element]
if (hasattr(element, 'spec')):
# strings that are members of vectors/maps
if (element.spec == 's'):
return 'std::string'
# structs that aren't defined in mojom that are members of vectors/maps
if (element.spec[0] == 'x'):
return element.spec.replace('x:', '').replace('.', '::')
if (mojom.IsInterfaceRequestKind(element) or
mojom.IsAssociatedKind(element) or
mojom.IsPendingRemoteKind(element) or
mojom.IsPendingReceiverKind(element) or
mojom.IsUnionKind(element)):
raise Exception('Unsupported element: %s' % element)
raise Exception('Unexpected element: %s' % element)
def AppendDecodeParams(initial_params, kind, bit):
""" Appends standard parameters for decode calls. """
params = list(initial_params)
if (kind == mojom.BOOL):
params.append(str(bit))
if mojom.IsReferenceKind(kind):
if mojom.IsArrayKind(kind):
params.append(GetArrayNullabilityFlags(kind))
else:
params.append(GetDartTrueFalse(mojom.IsNullableKind(kind)))
if mojom.IsInterfaceKind(kind):
params.append('%sProxy.newFromEndpoint' % GetDartType(kind))
if mojom.IsArrayKind(kind) and mojom.IsInterfaceKind(kind.kind):
params.append('%sProxy.newFromEndpoint' % GetDartType(kind.kind))
if mojom.IsInterfaceRequestKind(kind):
params.append('%sStub.newFromEndpoint' % GetDartType(kind.kind))
if mojom.IsArrayKind(kind) and mojom.IsInterfaceRequestKind(kind.kind):
params.append('%sStub.newFromEndpoint' % GetDartType(kind.kind.kind))
if mojom.IsArrayKind(kind):
params.append(GetArrayExpectedLength(kind))
return params
def AppendEncodeDecodeParams(initial_params, context, kind, bit):
""" Appends standard parameters shared between encode and decode calls. """
params = list(initial_params)
if (kind == mojom.BOOL):
params.append(str(bit))
if mojom.IsReferenceKind(kind):
if mojom.IsAnyArrayKind(kind):
params.append(GetArrayNullabilityFlags(kind))
else:
params.append(GetJavaTrueFalse(mojom.IsNullableKind(kind)))
if mojom.IsAnyArrayKind(kind):
if mojom.IsFixedArrayKind(kind):
params.append(str(kind.length))
else:
params.append(
'org.chromium.mojo.bindings.BindingsHelper.UNSPECIFIED_ARRAY_LENGTH'
)
if mojom.IsInterfaceKind(kind):
params.append('%s.MANAGER' % GetJavaType(context, kind))
if mojom.IsAnyArrayKind(kind) and mojom.IsInterfaceKind(kind.kind):
params.append('%s.MANAGER' % GetJavaType(context, kind.kind))
return params
def _GetExpectedCppParamType(self, kind):
def is_move_only_kind(kind):
if mojom.IsStructKind(kind) or mojom.IsUnionKind(kind):
return True
if mojom.IsArrayKind(kind):
return is_move_only_kind(kind.kind)
if mojom.IsMapKind(kind):
return (is_move_only_kind(kind.value_kind)
or is_move_only_kind(kind.key_kind))
if mojom.IsAnyHandleOrInterfaceKind(kind):
return True
return False
should_pass_param_by_value = ((not mojom.IsReferenceKind(kind))
or is_move_only_kind(kind))
typemap = MojoTypemapForKind(kind, False)
typestring = typemap.ExpectedCppType()
if mojom.IsNullableKind(kind) and not mojom.IsStructKind(kind):
typestring = "absl::optional<%s>" % typestring
if should_pass_param_by_value:
return typestring
return "const %s&" % typestring
def _GetUnionGetterReturnType(self, kind):
if mojom.IsReferenceKind(kind):
return "%s&" % self._GetCppWrapperType(kind)
return self._GetCppWrapperType(kind)
def _ShouldPassParamByValue(self, kind):
return ((not mojom.IsReferenceKind(kind)) or self._IsMoveOnlyKind(kind) or
self._IsCopyablePassByValue(kind))
def ShouldInlineUnion(union):
return not any(
mojom.IsReferenceKind(field.kind) and not mojom.IsStringKind(field.kind)
for field in union.fields)
def RequiresContextForDataView(kind):
for field in kind.fields:
if mojom.IsReferenceKind(field.kind):
return True
return False
def GetUnionGetterReturnType(kind):
if mojom.IsReferenceKind(kind):
return "%s&" % GetCppWrapperType(kind)
return GetCppWrapperType(kind)
def __init__(self, struct):
self.struct = struct
# |packed_fields| contains all the fields, in increasing offset order.
self.packed_fields = []
# |packed_fields_in_ordinal_order| refers to the same fields as
# |packed_fields|, but in ordinal order.
self.packed_fields_in_ordinal_order = []
# No fields.
if (len(struct.fields) == 0):
return
# Start by sorting by ordinal.
src_fields = self.packed_fields_in_ordinal_order
ordinal = 0
for index, field in enumerate(struct.fields):
if field.ordinal is not None:
ordinal = field.ordinal
src_fields.append(PackedField(field, index, ordinal))
ordinal += 1
src_fields.sort(key=lambda field: field.ordinal)
# Set |min_version| for each field.
next_min_version = 0
for packed_field in src_fields:
if packed_field.field.min_version is None:
assert next_min_version == 0
else:
assert packed_field.field.min_version >= next_min_version
next_min_version = packed_field.field.min_version
packed_field.min_version = next_min_version
if (packed_field.min_version != 0 and
mojom.IsReferenceKind(packed_field.field.kind) and
not packed_field.field.kind.is_nullable):
raise Exception("Non-nullable fields are only allowed in version 0 of "
"a struct. %s.%s is defined with [MinVersion=%d]."
% (self.struct.name, packed_field.field.name,
packed_field.min_version))
src_field = src_fields[0]
src_field.offset = 0
src_field.bit = 0
dst_fields = self.packed_fields
dst_fields.append(src_field)
# Then find first slot that each field will fit.
for src_field in src_fields[1:]:
last_field = dst_fields[0]
for i in range(1, len(dst_fields)):
next_field = dst_fields[i]
offset, bit = GetFieldOffset(src_field, last_field)
if offset + src_field.size <= next_field.offset:
# Found hole.
src_field.offset = offset
src_field.bit = bit
dst_fields.insert(i, src_field)
break
last_field = next_field
if src_field.offset is None:
# Add to end
src_field.offset, src_field.bit = GetFieldOffset(src_field, last_field)
dst_fields.append(src_field)
def ShouldPassParamByValue(kind):
return (not mojom.IsReferenceKind(kind)) or IsMoveOnlyKind(kind)
